Explorers fort built by Simpson and Dease for Franklin on Dease Bay at northeast end of Great Bear lake in 1837. It was a simple log house 40 feet long by 14 feet wide. This building was burned. It was rebuilt by Bell and Richardson 1848. The buildings were still in fair condition in 1898. No nails were used in the structure, but dove-tailing and wooden pegs. It was situated in a sheltered place protected by a large island. Its location is shown on Arrowsmith 1857 (No. 8) 1854 (No. 77) and map of Northern Canada (No. 35). On right bank at outlet of Dease river.